Endothermic
- Products have more energy than reactants
○ +∆𝐻
○ Ex: decomposition reaction
- Forward reaction has higher activation energy than reverse
Exothermic:
- Products have less energy than reactants
○ -∆𝐻
○ Ex: synthesis reactions 
- Reverse reaction has higher activation energy that forward reaction
Why is dissolving an ionic compound an ambiguous change (can be classified as both physical and chemical)
